Read Panasonic KX-TG8021UAC / KX-TG8021UAS / KX-TG8021UAT / KX-TGA800RUC / KX-TGA800RUS / KX-TGA800RUT Service Manual online
11
KX-TG8021UA/KX-TGA800RU
4.3.
Block Diagram (Handset)
SPEAKER
RECEIVER
MIC
CHARGE
CIRCUIT
Q4, Q9, R7Q4,
Q9,
R7
CHARGE
CONTACTS
CHARGE(+)
CHARGE(-)
CHARGE
CHARGE DETECT
EEPROM
SCL
SDA
Q2
BATTERY
T
ERMINAL
D7
BAT+
BAT-
4.0 V
1.8 V
2.5 V
LCD
SDA
RESET
CSB
CD
SCL
CPU
Analog
Front
End
D/A
A/D
35
33
16
15
20
32
31
57
58
13
43
14
63
56
55
66
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
Burst
Encoding
RF
Interface
9
10
XTAL
X1
10.368
MHz
BATTERY
41
ON SWITCH
KEYPAD
ROWS
COLUMNS
27, 49, 50, 51
22, 23, 24, 25, 26
BBIC
IC1
IC3
54
LCD-BACK LIGHT
52
19
LDO-CTRL
42
KEY-BACK LIGHT
IC801
2
3
RXn
RXp
78
77
73
TXn
TXp
Pon
PSEL
74
V
DD
-PADRY
4
3
6
7
75
80
TXon
RXon
D801
D802
6
72
ANT1
ANT2
9
8
ANT1
ANT2
5
RF PA
ANT1
ANT2
KX-TGA800 BLOCK DIAGRAM
(HANDSET)
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